3705643 has 4 divisors (see below), whose sum is σ = 3923640. Its totient is φ = 3487648.

The previous prime is 3705629. The next prime is 3705659. The reversal of 3705643 is 3465073.

3705643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465073 = 947 ⋅3659.

It is a cyclic number.

It is not a de Polignac number, because 3705643 - 2¹³ = 3697451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3705623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108973 + ... + 109006.

It is an arithmetic number, because the mean of its divisors is an integer number (980910).

Almost surely, 2^3705643 is an apocalyptic number.

3705643 is a deficient number, since it is larger than the sum of its proper divisors (217997).

3705643 is a wasteful number, since it uses less digits than its factorization.

3705643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217996.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 3705643 is about 1925.0046753190. The cubic root of 3705643 is about 154.7466273233.

The spelling of 3705643 in words is "three million, seven hundred five thousand, six hundred forty-three".